moulet



J. l.. A. A'. MQULET GASOLINE PUMP Filed April 25, 1919 2 sheets-Snam 2 5y; Wis

Patented Aug. 31, 1926.

UNITED STATES JEAN LOUIS LON ALEXANDRE `A 'IIBER'JJ MOULET, OF PARIS, FRANCE.

GASOLINE PUMP.

Application filed April 25, 1919, Serial No. 292,709, and in France March 2'4, 1919.

I have shown and described in my patent application United States Ser. No. 244,126 of July 9, 1918, a fuel or diaphragm pump which is specially advantageous for supplying fuel to motors of aerial machines, said pump being also adapted for luse as fuel supplying pump with any internal combustion engines such as motor car engines and generally speaking in all cases in .which 1o gasoline or any similar liquid has to be forced to a' higher level.

The present invention relates to an 1mproved construction of the pump of the above type, which allows of shortening the overall length of the apparatus, lengthening the life and improving the operation of the recoil spring and providing in a very simple way a hand control of the pump either through a pivoted hand lever or by mea-ns of a simple pull ring or similar device. y

In the annexed drawings given by way of example:

Fig. 1 is a longitudinal section of a gasoline pump constructed in accordance with the present iimprovements, withl additional hand lever control.

Fig. 2 is a detail in`-sectionJ along the line A-A, Fig. 1. o

Fig. 3 is a section similar to Fig. 1 of a. pump with additional direct pull control.

As shown in the drawings the improved pump still comprises most of the parts described in the previous patent application above referred to. a is the outer rigid casing; b is the collapsible envelope of the accordion type, which carries at one end the cap or hood b1 secured to a nut member d1 screwed upon the sliding rod d. The opposite end of envelope b is rigidly secured to the casing a.

The cap b1 is moved axially by the sliding rod d provided with an eye portionfe in which is arranged the eccentric disc or cam '5 z' operated from the motor shaft by the helical wheel y' and worm t. The sliding rod al is guided at its ends in the closed frame .sj which forms a gear case containing a lubricant. The fuel isdrawn in into the space between the outer casing ai and the collapsible diaphragm b through the inlet valve f and forced out through the outlet valve m.

As shown in the drawings, the recoil sprlng g which acts to move the sliding rod i d from the right to the left is in the form of a compression coiled spring located withbracket carried by the gear case s and car" rying rollers y which act against a flanged nut 2 screwed upon/the right hand end of the sliding rod al. A light spring 3 may be provided to keep the lever fw in its normally inoperative position. The hand lever w may be operated through any suitable connections or direct by hand.

In the construction shown in Fig. 3, the

compression spring is interposed directly between the cap b1 and the plate s1 forming a part of the gear case s. The sliding rod d may be operated by means o f a pull ring 4 directly attached thereto.

The operation lof the pump is ysubstantially as in the previous construction above referred to. When the slidingy rod UZ is moved to the right either by the cam i, lever fw or pull ring 4, the spring g is compressed and fuel is sucked in into the pump through the valve f. The r'od d is then moved to the left by the spring which expands and fuel is forced out through the valve If the delivery of fuel, exceeds the amount consumed, the spring is kept under compression, the sliding rod a. is no longer actuated by the cam and no ,fuel is drawn in into the pump until a suiiicient amount of fuel has been discharged, the pump being thus self regulating.

Obviously, one of the valves could be mounted axially at the left end of the casing a if found convenient. l The worm t may be driven through direct pulley or any other connection from the motor shaft. Moreover, if the accordion envelope is ysufficiently elastic and in the case of small pressures, the spring g may be dispensed with.

The envelope b is preferably formed, as shown, by dished annular sheet metal plates which are soldered to each other along their outer and `inner edges.

Having now described my invention what I claim as new and desire to secure by Letters Patent is:

1. A gasoline pump comprising in combination an outer casing, an inlet ,valve and an outlet valve on said casing, an inner colcoupling, a belt lapsible and elastic envelope of the accordion type secured to the outer casing by a liquid tight joint,.said inner envelope embodying dished annular metal plates soldered to each other along their outer and inner edges, a sliding rod secured to the inner collapsible envelope, and means for periodically moving said rod in the direction of suction.

2. A gasoline pump comprising in combination an outer casing, an inlet valve and an outlet valve on said casing, an inner collapsible and elastic envelope of the accordion type secured to the outer casing by a liquid tight joint, whereby a fuel chamber is formed outside the inner envelope, a sliding rod -secured to the inner collapsible envelope, means for periodically moving said rod in thedirection of suction, a member secured to the outer casing and a compression spring located within'the inner collapsible envelope and interposed between the latter and said member.-

3. A gasoline pump comprising in combination an outer casing, an inlet valve and an outlet valve on said casing, `an inner collapsible and elastic envelope of the accordion type secured to the" outer casing by a liquid tight joint, a sliding rod secured to the inner collapsible envelope, means for periodically moving said rod in one direcfuel and the fuel consuming elements of the engine, a resilient pumping member in said casing, means'to positively flex said member to provide a Suction stroke, and a spring coacting with said member to `aid the same in its I. pressure stroke.

7. In a fuel-feeding system for engines, in combination, a pump casing adapted to be operativel connected to the source of fuel and the giel consuming elements of the engine, a resilient expansible and collapsible wall in said casing, and means to positively actuate said wall in oneV direction to provide a suction stroke, said wall moving in the opposite direction by the force of resiliency to provide a pressure stroke.

8. In'a fuel-'feeding system for engines, in combination, a pump casing adapted to be operatively connected to the source of fuel and the fuel consuming elements of the engine, a flexible wall in said casing, engine-driven means having a one-way connection with said wall to flex the same, and manual means to flex said wall'when said casing is to be primed. v

9. In a fuel-feeding system for engines, in combination, a pump casing adapted to be operativel connected to. the source of fuel and the uel consuming elements of the engine, an expansible and collapsible wall tion, a member secured to the outer casing',` ,in said casing, engine-driven means for flexan adjustable nut screwed upon said member and a compressione spring located .within the inner collapsible envelope and\ interposed betweenthe latter and said adjustable nut.

4. A gasoline pump comprising in combination an outer casing, an inlet valve and an outlet valve on -said casing,an,: inner collapsible and elastic envelope of the accordion type secured to the outer casing by a liquid tight joint, a sliding rod secured to the inner collapsible envelope, motor operated means adapted to act upon said sliding rod at a point intermediate its length for periodical y moving said rod in one direction, separate hand controlled means adapted to act upon the free end of said rod for moving said rod in the same direction, a member secured to the outer casing and a compression spring located within the inner collapsible\envelope and interposed `betWeen the latter and said member.

5. In a fuel-feeding system for engines, in combination, a pump casing adapted to be operativel connected to the source of fuel and the .uel consuming elements of the engine, a resilient pumping member in said casing, and means to positively flex said member to provide a suction stroke, said member making its pressure stroke by the force ofits resiliency.

6. In a `Jfuel-feeding system for engines, in combination, a pump easing adapted to be operatively connected to the source of i' ing said walleinone direction to provide a suction stroke, said Wall making its pressure stroke by the force of resiliency, and. manual means to flex said wall when said casing is to be primed.

10. In a fuel-feeding system for engines,

in combination, a pump casing adapted to be operatively connected to the source of fuel and the fuel consuming elements, a resilient member in said casing, and means for positively flexing said member to provide a suction stroke, said member being movable with respect to said means in response to the pressurein said casing and making its pressure .stroke by the force of resiliency.

11. A fuel feeding system for internal combustion engines comprising in combination apump adapted 'to Abe operatively kconnected` with the carbureter of said engine, for supplying fuel-i-'to'said carbureter and including a resilientpumping member, and -means whereby said member makes its pressure stroke` by the force of resiliency to vary the supply of-"fuel automatically with the withdrawal of fuel from said carbureter.

12. In a fuel-feeding system for engines, in combination, a pump casingadapted to be operatively connected to the source of fuel and the fuel consuming elements of the engine', a resilient wall in said casing, and. means including an engine-driven element operative to flex said wall in one-direction iso only, said wall movin in the opposite direction by the force o resiliency.

13. A pump comprising in combination, aresilient member, means for moving said member positively to provide a suction stroke, and' resilient means coacting with said member in moving"said member on its pressure stroke whereby the length of said stroke is determined by the pressure on the Huid being pumped thereby.

14. In a fuel-feeding system for engines, a pump adapted to be operativel connected with the source of fuel and t e fuel consuming elements of the engine for supplying fuel to said elements, said pump includinga resilient. pumping member and actuating means for the same' so related thereto that said member may move with respect to said means in response to pressure variations in the fuel.

15. In a fuel-feeding system for engines, a pump adapted to be operatively connected with the source of fuel and the fuel consuming elements of the engine for supplying fuel to said elements, said pump including aresilient pumping member, resilient means coacting With said member in opposing movement thereof in one direction and aidin movement thereof in the opposite directlon, and actuating means for said member so related thereto that said member and actuating means may move with respect.

to each other. v f

In testimony -whereof I have signed my name to this specication.

JEAN LOUIS LEON ALEXANDRE ALBERT MOULET. 

